Hi, i’m having two 12v 335 watts panels in parallel and i’m receiving a e08 error that stands for pv input over current. it should be capable of 800w?

Two 335W panels in parallel is 670W (assuming they have the same electrical specs). The Renogy spec sheet says that model RVR-40 only handles up to 520W in the 12V configuration (i.e. connected to a 12V battery bank). The 800W you mentioned is for the RVR-30 in the 24V configuration (i.e. two 12V batteries in series).

Can I disconnect the battery while the solar collector is still connected?

No, I dont think that's a good idea since they say connect batteries first the solor panels. If you was to shut ur system down, the go in reverse. Panels discount then battery.

ASIN	B07DNVW37B
Best Sellers Rank	215,011 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 360 in Solar & Wind Energy MPPT Controllers
Brand	Renogy
Colour	Black
Customer Reviews	4.2 out of 5 stars 629 Reviews
Display Type	LCD
Global Trade Identification Number	00810009715825, 00816360027492
Included Components	Rover 60 Amp MPPT Solar Charge Controller
Item Dimensions L x W x H	15.1L x 5.9W x 21H centimetres
Item Type Name	Rover 30A 12V/24V Auto DC Input MPPT Solar Charge Controller Parameter Adjustable LCD Display Solar Panel Regulator fit for Gel Sealed Flooded and Lithium Battery, Rover 30A
Item Weight	4.4 Pounds
Item height	2.85 inches
Item weight	4.4 Pounds
Manufacturer	Renogy
Material	Renogy Solar
Product Warranty	2-year material and workmanship warranty
Product dimensions	15.1L x 5.9W x 21H centimetres
UPC	810009715825 816360027492
Unit Count	1.0 count
Voltage	24 Volts (DC)

Renogy Rover 30A 12V/24V Auto DC Input MPPT Solar Charge Controller Parameter Adjustable LCD Display Solar Panel Regulator fit for Gel Sealed Flooded and Lithium Battery, Rover 30A,Black

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